EP2048725A1 - Device for storing electric energy, in particular for equipping an automobile - Google Patents

Device for storing electric energy, in particular for equipping an automobile Download PDF

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Publication number
EP2048725A1
EP2048725A1 EP08105466A EP08105466A EP2048725A1 EP 2048725 A1 EP2048725 A1 EP 2048725A1 EP 08105466 A EP08105466 A EP 08105466A EP 08105466 A EP08105466 A EP 08105466A EP 2048725 A1 EP2048725 A1 EP 2048725A1
Authority
EP
European Patent Office
Prior art keywords
electrical connection
connection element
energy storage
substantially rigid
rigid electrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08105466A
Other languages
German (de)
French (fr)
Inventor
Roger Abadia
Fabien Guerin
Alexis Hosni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Equipements Electriques Moteur SAS
Original Assignee
Valeo Equipements Electriques Moteur SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR0758283A external-priority patent/FR2922377B1/en
Priority claimed from FR0758281A external-priority patent/FR2922378B1/en
Application filed by Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP2048725A1 publication Critical patent/EP2048725A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/34—Gastight accumulators
    • H01M10/345—Gastight metal hydride accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention relates to a device for storing electrical energy, in particular for equipping a motor vehicle.
  • such a power storage device is for example arranged to be loaded during a regenerative braking phase and discharged during vehicle start-up and acceleration phases.
  • Such a balancing circuit is connected to the different energy storage cells by wires so as to raise the potential of the cells to this balancing circuit.
  • the diameter of the wires is relatively small, which makes it difficult to weld the wires on a power conductor or an electronic card.
  • wires conventionally comprise copper to be connected to an aluminum power conductor. These materials generally require a solder bond to prevent corrosion of the 0 milliampere bond.
  • the invention aims in particular to overcome the aforementioned drawbacks.
  • the electrical connection advantageously comprises at least one substantially rigid electrical connection element provided with an end remote from said cell.
  • This distance between said end and the cell corresponds for example to a distance of 1 mm or 2 mm or more.
  • substantially rigid in particular the property that has an element that substantially keeps its shape under the effect of its own weight, unlike for example a flexible wire which is deformed under the effect of its own weight.
  • the invention it is possible for example, when the energy storage cell is placed vertically, simply to remount a potential taken from this energy storage cell, said end remote from the connection element then serving to recover the potential on the top of the cell.
  • the assembly of a substantially rigid electrical connection element is simpler than that of a flexible wire.
  • the electronic unit may be housed in a separate housing of a housing in which the energy storage cells are placed.
  • the energy storage cell extends substantially along a longitudinal axis
  • the substantially rigid electrical connection element comprises at least one portion extending substantially parallel to the longitudinal axis of the cell.
  • the substantially rigid electrical connection element comprises at least one branch, in particular extending vertically.
  • This branch comprises for example two parallel straight edges.
  • the substantially rigid electrical connection element is connected to a power conductor, in particular a power connection bar which is itself connected to the energy storage cell.
  • the substantially rigid electrical connection member may be soldered to the power connection bar.
  • the substantially rigid electrical connection element can be mechanically assembled with the power connection bar, in particular by screwing or riveting or crimping.
  • the substantially rigid electrical connection element is fixed, in particular by welding or by mechanical assembly, to a wall of the energy storage cell, in particular a side wall thereof. this.
  • the substantially rigid electrical connection member may be formed directly on a power connection bar connected to the energy storage cell.
  • the substantially rigid electrical connection member is derived from a blank of material on the power connection bar.
  • one end of the substantially rigid electrical connection element is fixed on the electronic unit.
  • the substantially rigid electrical connection element may extend for example between two neighboring energy storage cells.
  • the substantially rigid electrical connection element has a substantially polygonal cross section, in particular rectangular.
  • this section may be for example circular or oval.
  • the substantially rigid electrical connection element is bare, being devoid of insulating coating, in particular an insulating sheath.
  • the substantially rigid electrical connection element may be made at least partially of copper or aluminum.
  • the energy storage cell preferably comprises at least one super-capacitor.
  • the energy storage cell may comprise, for example, a Li-On (Lithium-Ion), Ni-Mh (nickel-metal hydride) or lead battery.
  • the electronic unit comprises a circuit for balancing the energy storage cells.
  • the electronic unit comprises a circuit for balancing the energy storage cells.
  • other types of electronic cards may be provided.
  • the invention thus makes it possible to assemble in a simple manner the various elements of the device. For example, it is possible, if necessary, to have on a single common insulating support all the electrical connections used to raise the cell potentials to the electronic unit.
  • the insulating support comprises a plate.
  • the insulating support is made of plastic.
  • At least one of the electrical connections comprises at least one conductive portion embedded in the material of the insulating support.
  • the insulating support may in particular be made by overmolding the conductive portion of the electrical connection.
  • At least one of the electrical connections may comprise at least one conductive portion extending on an outer face of the insulating support.
  • At least one of the electrical connections may comprise an electrical connection element carried by the insulating support and comprising a connection tab projecting from the insulating support.
  • the connecting lug is for example welded or, alternatively, mechanically assembled, for example by screwing or riveting, with another electrical connection element of the electrical connection.
  • This connecting lug may, if necessary, extend substantially perpendicular to the insulating support. Alternatively, this tab may extend parallel to the insulating support.
  • the insulating support may comprise at least one opening for passing another electrical connection element of the electrical connection.
  • the electronic unit comprises an electronic card provided with at least one opening for passing an electrical connection element.
  • the insulating support may comprise, where appropriate, at least one element for holding the energy storage cells relative to one another, this element comprising in particular at least one retaining skirt.
  • the electronic unit in particular the electronic card, is arranged on the insulating support.
  • the micro-hybrid device comprises a regenerative braking system.
  • the device 1 comprises a plurality of energy storage cells 2, ten in the example described, arranged vertically along a longitudinal axis X, and an electronic unit 3.
  • Each cell 2 comprises a supercapacitor or EDLC in English ( electrochemical double layer capacitator ).
  • the cells 2 may comprise a Li-On battery (Lithium-Ion), Ni-Mh (nickel-metal hydride) or lead.
  • Li-On battery Li-Ion
  • Ni-Mh nickel-metal hydride
  • the electronic unit 3 comprises a printed circuit board 11 forming a cell balancing circuit 2.
  • This electronic unit 3 is distinct from DC / DC or AC / DC converters, not shown, which are connected to the cells 2 via power conductors, in particular power bars.
  • the cells 2 and the electronic unit 3 are arranged in a housing 10, for example made of plastic, as illustrated in FIG. figure 2 .
  • the cells 2 are connected together in series using power conductors formed, in the example described, by power bars 5 or bus bars in English.
  • the cells 2 are connected in pairs by means of power bars 5 alternately placed on the top and the bottom of the cells 2, as can be seen in FIG. figure 2 especially.
  • Electrical connections 4 are provided for connecting the energy storage cells 2 and the electronic unit 3 to enable the balancing circuit to have information representative of an electrical quantity, in particular an electrical potential, of the cells. energy storage 2.
  • These electrical connections 4 are different from power links (traversed for example by a current of intensity of about 200A, or even with a peak of intensity of 1000 AT).
  • the potential taken from the bottom of the cells 2 is raised using vertical electrical connection elements 12.
  • the rigid connection elements 12 are made of copper or aluminum, for example, and have a substantially rectangular cross section.
  • the connecting elements 12 are bare, being devoid of insulating coating.
  • each connecting element 12 has a vertical rectilinear branch 13 extending at its lower end by a lug 14 under the power bar 5, on a long side thereof.
  • the tab 14 is for example welded to the power bar 5.
  • connection element 12 can be mechanically fixed to the power bar 5, for example by screwing or riveting or crimping.
  • connection element 12 is connected at its upper end 15 to another horizontal connection element 20 of the connection 4 considered, as can be seen on the figure 4 especially.
  • This junction is made for example by electric welding or, alternatively, mechanically, for example by screwing or riveting or crimping.
  • connection element 12 The upper end 15 of the connection element 12 is remote from the cells 2, being accessible above them.
  • connection elements 20 are overmoulded by a plastics material, for example polyamide, so as to form the insulating support 22 in the form of a plate with parallel flat faces.
  • a plastics material for example polyamide
  • Each portion 21 is extended at one end by a first vertical leg 25 connected to the branch 13 of the connection element 12 and at the other end by a second vertical leg 26 provided with a lug 27.
  • the tabs 25 and 26 at the end protrude from the edge of the plate 22.
  • connection element 12 extends through an opening 19 of the insulating support 22.
  • the lug 27 is introduced into an opening 28 of the printed circuit board 11, as illustrated in FIGS. Figures 3 and 4 .
  • This lug 27 is welded to the card 11 for example by a solder by adding material (for example of the type tin / lead) or a wave solder.
  • connection element 20 is thus electrically connected to a conductive track 29 of the printed circuit board 11.
  • first and second legs 25 and 26 may be different.
  • the insulating support 22 carries eleven electrical connection elements for transmitting to the electronic unit 3 potential information of ten energy storage cells 2.
  • connections between the electronic unit 3 and the cells 2 can be simple and require a reduced number of operations, especially with respect to the use of electric wires.
  • the invention makes it possible to perform a keying, unlike wires that can be interchanged, which avoids errors during assembly.
  • the vertical connection element 12 is attached to the lug 25 of the horizontal connection element 20 (see FIG. figure 4 ) to make the junction.
  • connection elements are made differently.
  • connection element 12 connected to a power bar can extend horizontally and comprise a bent portion 30 inserted into an opening 31 made on the connection element 20 carried by the insulating support 22.
  • connection member 35 directly placed against a side wall 36 of one of the cells 2 for transmitting potential information.
  • connection element 35 comprises a vertical tab 37 and, on either side of it, two lateral branches 38 placed against the top of the wall 36 of the cell 2.
  • connection element 35 is for example formed by cutting and folding a sheet.
  • the tab 37 is provided with an orifice 39 for receiving a lug, not shown, of a connection element to clamp on this lug 37.
  • connection element 40 comprising two substantially flat portions 41 and 42 separated by a bead 43.
  • This bead 43 makes it possible to create a mechanical weakness capable of absorbing forces (for example vibrations), which limits the forces on the contacts with the cells 2.
  • This element 40 is placed on two neighboring cells 2, each portion 41 or 42 being in contact with a terminal of one of the cells 2.
  • connection element 40 has a lug 44 with an orifice 39, like the lug 37 previously described.
  • the element 40 is made for example by cutting and folding a metal sheet.
  • element 40 serves both as a power conductor and to reassemble potential information via pin 44.
  • connection elements may be provided.
  • connection element 50 also placed on the top of two cells 2, and serving as a power conductor.
  • This element 50 of generally rectangular shape comprises a central cutout 51 in which extends a tab 52 intended to be connected to another connection element, not shown, for transmitting potential information.
  • the element 50 is made for example by cutting and folding a metal sheet.
  • the insulating support 22 may be arranged to cover the energy storage cells 2 and may include, where appropriate, one or more holding skirts 55 for holding the cells 2 relative to each other, as illustrated in FIG. dotted at the figure 2 .
  • skirts 55 are for example made during overmoulding of the connection elements 22.
  • connection element 12 can, if desired, be connected directly to the printed circuit board 11.
  • the invention can be applied to any electrical machine requiring a connection with an electrical source, for example a simple alternator.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The device (1) has an electrical connection (4) connecting an electronic unit (3) to energy storage cells (2) e.g. lithium battery, for permitting the electronic unit to use information representing electrical quantities i.e. electrical potential, of the cells. The electrical connection has a bare rigid electric connection element with an end that is remote from the cells, where the element is mechanically fixed on a power bar (5). The rigid electric connection element has a portion that is extended parallel to a longitudinal axis of the cells, and is made of copper or aluminum.

Description

L'invention concerne un dispositif de stockage d'énergie électrique, notamment pour équiper un véhicule automobile.The invention relates to a device for storing electrical energy, in particular for equipping a motor vehicle.

De manière connue, un tel dispositif de stockage d'énergie est par exemple agencé pour être chargé lors d'une phase de freinage récupératif et déchargé lors de phases de démarrage et d'accélération du véhicule.In known manner, such a power storage device is for example arranged to be loaded during a regenerative braking phase and discharged during vehicle start-up and acceleration phases.

Dans une chaîne de cellules de stockage d'énergie connectées en série, ces cellules comportant par exemple chacune un super-condensateur, des différences de tension de charge peuvent apparaître entre les cellules du fait notamment :

  • de différences entre les valeurs de capacité inhérentes à la fabrication des cellules,
  • de l'existence de courants de fuite d'intensités différentes.
In a chain of energy storage cells connected in series, these cells each comprising for example a super-capacitor, differences in charge voltage may appear between the cells, in particular because:
  • differences in capacitance values inherent to cell fabrication,
  • the existence of leakage currents of different intensities.

La persistance de ces écarts dans le temps peut provoquer le vieillissement accéléré, voire la destruction, des cellules qui supportent des tensions de charge les plus élevées.The persistence of these deviations over time can cause accelerated aging or even destruction of cells that support the highest load voltages.

Il est connu de prévoir un circuit d'équilibrage pour corriger ces déséquilibres.It is known to provide a balancing circuit to correct these imbalances.

On peut se référer par exemple à la demande de brevet US 2003/0214267 .For example, one can refer to the patent application US 2003/0214267 .

Un tel circuit d'équilibrage est relié aux différentes cellules de stockage d'énergie par des fils de manière à remonter le potentiel des cellules vers ce circuit d'équilibrage.Such a balancing circuit is connected to the different energy storage cells by wires so as to raise the potential of the cells to this balancing circuit.

L'utilisation de fils présente un certain nombre d'inconvénients.The use of wires has a number of disadvantages.

Par exemple, il est nécessaire de gérer des sur-longueurs de fils, lesquels fils présentent le risque de s'accrocher à des éléments du voisinage lors de l'assemblage, voire d'être coupés.For example, it is necessary to manage over-lengths of son, which son have the risk of clinging to neighborhood elements during assembly, or even being cut.

De plus le diamètre des fils est relativement faible, ce qui rend difficile les opérations de soudure des fils sur un conducteur de puissance ou une carte électronique.In addition, the diameter of the wires is relatively small, which makes it difficult to weld the wires on a power conductor or an electronic card.

Enfin les fils comportent de manière classique du cuivre à relier à un conducteur de puissance en aluminium. Ces matériaux imposent généralement une liaison par soudure pour éviter une corrosion de la liaison à 0 milli- Ampère.Finally, the wires conventionally comprise copper to be connected to an aluminum power conductor. These materials generally require a solder bond to prevent corrosion of the 0 milliampere bond.

L'invention vise notamment à remédier aux inconvénients précités.The invention aims in particular to overcome the aforementioned drawbacks.

L'invention a ainsi pour objet un dispositif de stockage d'énergie électrique, notamment pour équiper un véhicule automobile, comportant :

  • au moins une cellule de stockage d'énergie,
  • une unité électronique, comportant notamment une carte électronique, l'unité électronique étant notamment différente d'un convertisseur de tension,
  • au moins une liaison électrique reliant ladite au moins une cellule de stockage d'énergie et l'unité électronique pour permettre à cette unité électronique de disposer d'une information représentative d'une grandeur électrique, notamment d'un potentiel électrique, de la cellule de stockage d'énergie.
The invention thus relates to a device for storing electrical energy, in particular for equipping a motor vehicle, comprising:
  • at least one energy storage cell,
  • an electronic unit, notably comprising an electronic card, the electronic unit being in particular different from a voltage converter,
  • at least one electrical connection connecting said at least one energy storage cell and the electronic unit to enable said electronic unit to have information representative of an electrical quantity, in particular of an electrical potential, of the cell energy storage.

La liaison électrique comprend avantageusement au moins élément de connexion électrique sensiblement rigide pourvu d'une extrémité éloignée de ladite cellule.The electrical connection advantageously comprises at least one substantially rigid electrical connection element provided with an end remote from said cell.

Cet éloignement entre ladite extrémité et la cellule correspond par exemple à une distance de 1 mm ou 2 mm, voire davantage.This distance between said end and the cell corresponds for example to a distance of 1 mm or 2 mm or more.

On entend par 'sensiblement rigide' notamment la propriété que possède un élément qui garde sensiblement sa forme sous l'effet de son propre poids, contrairement par exemple à un fil souple qui se déforme sous l'effet de son propre poids.The term "substantially rigid" in particular the property that has an element that substantially keeps its shape under the effect of its own weight, unlike for example a flexible wire which is deformed under the effect of its own weight.

Grâce à l'invention, il est possible par exemple, lorsque la cellule de stockage d'énergie est posée verticalement, de remonter simplement un potentiel pris sur cette cellule de stockage d'énergie, ladite extrémité éloignée de l'élément de connexion servant alors à récupérer le potentiel sur le haut de la cellule.Thanks to the invention, it is possible for example, when the energy storage cell is placed vertically, simply to remount a potential taken from this energy storage cell, said end remote from the connection element then serving to recover the potential on the top of the cell.

En particulier, l'assemblage d'un élément de connexion électrique sensiblement rigide est plus simple que celui d'un fil souple.In particular, the assembly of a substantially rigid electrical connection element is simpler than that of a flexible wire.

Si on le souhaite, l'unité électronique peut être logée dans un boîtier distinct d'un boîtier dans lequel sont placées les cellules de stockage d'énergie.If desired, the electronic unit may be housed in a separate housing of a housing in which the energy storage cells are placed.

Dans un exemple de mise en oeuvre de l'invention, la cellule de stockage d'énergie s'étend sensiblement suivant un axe longitudinal, et l'élément de connexion électrique sensiblement rigide comporte au moins une portion s'étendant sensiblement de manière parallèle à l'axe longitudinal de la cellule.In an exemplary implementation of the invention, the energy storage cell extends substantially along a longitudinal axis, and the substantially rigid electrical connection element comprises at least one portion extending substantially parallel to the longitudinal axis of the cell.

Par exemple, l'élément de connexion électrique sensiblement rigide comporte au moins une branche, notamment s'étendant verticalement. Cette branche comporte par exemple deux bords rectilignes parallèles.For example, the substantially rigid electrical connection element comprises at least one branch, in particular extending vertically. This branch comprises for example two parallel straight edges.

Le cas échéant, l'élément de connexion électrique sensiblement rigide est relié à un conducteur de puissance, notamment une barre de connexion de puissance elle-même reliée à la cellule de stockage d'énergie.Where appropriate, the substantially rigid electrical connection element is connected to a power conductor, in particular a power connection bar which is itself connected to the energy storage cell.

L'élément de connexion électrique sensiblement rigide peut être soudé sur la barre de connexion de puissance.The substantially rigid electrical connection member may be soldered to the power connection bar.

En variante, l'élément de connexion électrique sensiblement rigide peut être assemblé mécaniquement avec la barre de connexion de puissance, notamment par vissage ou rivetage ou sertissage.Alternatively, the substantially rigid electrical connection element can be mechanically assembled with the power connection bar, in particular by screwing or riveting or crimping.

Dans un exemple de mise en oeuvre de l'invention, l'élément de connexion électrique sensiblement rigide est fixé, notamment par soudure ou par assemblage mécanique, sur une paroi de la cellule de stockage d'énergie, notamment une paroi latérale de celle-ci.In an exemplary implementation of the invention, the substantially rigid electrical connection element is fixed, in particular by welding or by mechanical assembly, to a wall of the energy storage cell, in particular a side wall thereof. this.

Si on le souhaite, l'élément de connexion électrique sensiblement rigide peut être formée directement sur une barre de connexion de puissance reliée à la cellule de stockage d'énergie.If desired, the substantially rigid electrical connection member may be formed directly on a power connection bar connected to the energy storage cell.

Par exemple, l'élément de connexion électrique sensiblement rigide est issu d'une découpe de matière sur la barre de connexion de puissance.For example, the substantially rigid electrical connection member is derived from a blank of material on the power connection bar.

Dans un exemple de mise en oeuvre de l'invention, l'une des extrémités de l'élément de connexion électrique sensiblement rigide est fixée sur l'unité électronique.In an exemplary implementation of the invention, one end of the substantially rigid electrical connection element is fixed on the electronic unit.

L'élément de connexion électrique sensiblement rigide peut s'étendre par exemple entre deux cellules de stockage d'énergie voisines.The substantially rigid electrical connection element may extend for example between two neighboring energy storage cells.

Le cas échéant, l'élément de connexion électrique sensiblement rigide présente une section transversale sensiblement polygonale, notamment rectangulaire. En variante, cette section peut être par exemple circulaire ou ovale.Where appropriate, the substantially rigid electrical connection element has a substantially polygonal cross section, in particular rectangular. Alternatively, this section may be for example circular or oval.

Dans un exemple de mise en oeuvre de l'invention, l'élément de connexion électrique sensiblement rigide est nu, étant dépourvu de revêtement isolant, notamment d'une gaine isolante.In an exemplary implementation of the invention, the substantially rigid electrical connection element is bare, being devoid of insulating coating, in particular an insulating sheath.

L'élément de connexion électrique sensiblement rigide peut être réalisé au moins partiellement en cuivre ou en aluminium.The substantially rigid electrical connection element may be made at least partially of copper or aluminum.

La cellule de stockage d'énergie comporte de préférence au moins un super-condensateur. En variante, la cellule de stockage d'énergie peut comporter par exemple une batterie Li-On (Lithium- Ion), Ni-Mh (Nickel- Métal hydrure) ou au Plomb.The energy storage cell preferably comprises at least one super-capacitor. As a variant, the energy storage cell may comprise, for example, a Li-On (Lithium-Ion), Ni-Mh (nickel-metal hydride) or lead battery.

De préférence, l'unité électronique comporte un circuit d'équilibrage des cellules de stockage d'énergie. En variante, d'autres types de cartes électroniques peuvent être prévus.Preferably, the electronic unit comprises a circuit for balancing the energy storage cells. Alternatively, other types of electronic cards may be provided.

L'invention a encore pour objet, en combinaison avec ou indépendamment de ce qui précède, un dispositif de stockage d'énergie, notamment pour équiper un véhicule automobile, comportant :

  • au moins deux cellules de stockage d'énergie,
  • une unité électronique, comportant notamment une carte électronique, l'unité électronique étant notamment différente d'un convertisseur de tension,
  • au moins deux liaisons électriques reliant respectivement les cellules de stockage d'énergie à l'unité électronique pour permettre à cette unité électronique de disposer d'une information représentative d'une grandeur électrique, notamment d'un potentiel électrique, des cellules de stockage d'énergie, les liaisons électriques étant portées au moins partiellement par un support isolant commun.
The subject of the invention is also, in combination with or independently of the foregoing, a device for storing energy, in particular for equipping a motor vehicle, comprising:
  • at least two energy storage cells,
  • an electronic unit, notably comprising an electronic card, the electronic unit being in particular different from a voltage converter,
  • at least two electrical links respectively connecting the energy storage cells to the electronic unit to enable said electronic unit to have information representative of a magnitude electrical, including an electrical potential, energy storage cells, the electrical connections being carried at least partially by a common insulating support.

L'invention permet ainsi d'assembler de manière simple les différents éléments du dispositif. Par exemple, il est possible, le cas échéant, d'avoir sur un seul support isolant commun toutes les liaisons électriques utiles pour remonter les potentiels des cellules vers l'unité électronique.The invention thus makes it possible to assemble in a simple manner the various elements of the device. For example, it is possible, if necessary, to have on a single common insulating support all the electrical connections used to raise the cell potentials to the electronic unit.

De préférence, le support isolant comporte une plaque.Preferably, the insulating support comprises a plate.

Avantageusement, le support isolant est réalisé en matière plastique.Advantageously, the insulating support is made of plastic.

Dans un exemple de mise en oeuvre de l'invention, l'une au moins des liaisons électriques comporte au moins une portion conductrice noyée dans la matière du support isolant.In an exemplary implementation of the invention, at least one of the electrical connections comprises at least one conductive portion embedded in the material of the insulating support.

Le support isolant peut notamment être réalisé par surmoulage de la portion conductrice de la liaison électrique.The insulating support may in particular be made by overmolding the conductive portion of the electrical connection.

En variante, l'une au moins des liaisons électriques peut comporter au moins une portion conductrice s'étendant sur une face extérieure du support isolant.Alternatively, at least one of the electrical connections may comprise at least one conductive portion extending on an outer face of the insulating support.

Dans un exemple de mise en oeuvre de l'invention, l'une au moins des liaisons électriques peut comporter un élément de connexion électrique porté par le support isolant et comprenant une patte de connexion faisant saillie du support isolant.In an exemplary implementation of the invention, at least one of the electrical connections may comprise an electrical connection element carried by the insulating support and comprising a connection tab projecting from the insulating support.

La patte de connexion est par exemple soudée ou, en variante, assemblée de manière mécanique, par exemple par vissage ou rivetage, avec un autre élément de connexion électrique de la liaison électrique.The connecting lug is for example welded or, alternatively, mechanically assembled, for example by screwing or riveting, with another electrical connection element of the electrical connection.

Cette patte de connexion peut, le cas échéant, s'étendre sensiblement perpendiculairement au support isolant. En variante, cette patte peut s'étendre parallèlement au support isolant.This connecting lug may, if necessary, extend substantially perpendicular to the insulating support. Alternatively, this tab may extend parallel to the insulating support.

Dans un exemple de mise en oeuvre de l'invention, le support isolant peut comporter au moins une ouverture pour laisser passer un autre élément de connexion électrique de la liaison électrique.In an exemplary implementation of the invention, the insulating support may comprise at least one opening for passing another electrical connection element of the electrical connection.

Si on le souhaite, l'unité électronique comporte une carte électronique pourvue d'au moins une ouverture pour laisser passer un élément de connexion électrique.If desired, the electronic unit comprises an electronic card provided with at least one opening for passing an electrical connection element.

Le support isolant peut comporter, le cas échéant, au moins un élément de maintien des cellules de stockage d'énergie l'une par rapport à l'autre, cet élément comprenant notamment au moins une jupe de maintien.The insulating support may comprise, where appropriate, at least one element for holding the energy storage cells relative to one another, this element comprising in particular at least one retaining skirt.

Dans un exemple de mise en oeuvre de l'invention, l'unité électronique, notamment la carte électronique, est disposée sur le support isolant.In an exemplary implementation of the invention, the electronic unit, in particular the electronic card, is arranged on the insulating support.

L'invention pourra être mieux comprise à la lecture de la description détaillée qui va suivre, d'exemples de mise en oeuvre non limitatifs de l'invention, et à l'examen du dessin annexé, sur lequel :

  • la figure 1 représente, schématiquement et partiellement, en vue de dessus, un dispositif de stockage d'énergie conforme à un exemple de mise en oeuvre de l'invention,
  • la figure 2 représente, schématiquement et partiellement, en coupe suivant II-II, le dispositif de la figure 1,
  • la figure 3 illustre, schématiquement et partiellement, en coupe, la jonction entre un élément de connexion électrique et une carte de circuit imprimé d'une unité électronique du dispositif de la figure 1,
  • la figure 4 représente, schématiquement et partiellement, en perspective, l'élément de connexion et la carte de circuit imprimé de la figure 3,
  • la figure 5 est une vue en coupe, schématique et partielle, de la jonction entre deux éléments de connexion électrique du dispositif de la figure 1,
  • la figure 6 est une vue en coupe, schématique et partielle, de la jonction entre un élément de connexion électrique et une barre de connexion de puissance du dispositif de la figure 1,
  • la figure 7 représente, schématiquement et partiellement, en perspective, un élément de connexion conforme à un exemple de mise en oeuvre de l'invention,
  • les figures 8 et 9 représentent, schématiquement et partiellement, en perspective, un élément de connexion conforme respectivement à deux autres exemples de mise en oeuvre de l'invention, et
  • la figure 10 est une vue en coupe selon X-X, schématique et partielle, de l'élément de connexion de la figure 9.
The invention can be better understood on reading the following detailed description, non-limiting examples of implementation of the invention, and on examining the appended drawing, in which:
  • the figure 1 represents, schematically and partially, in plan view, an energy storage device according to an exemplary implementation of the invention,
  • the figure 2 represents, schematically and partially, in section along II-II, the device of the figure 1 ,
  • the figure 3 illustrates, schematically and partially, in section, the junction between an electrical connection element and a printed circuit board of an electronic unit of the device of the figure 1 ,
  • the figure 4 represents, schematically and partially, in perspective, the connection element and the circuit board of the figure 3 ,
  • the figure 5 is a sectional view, schematic and partial, of the junction between two electrical connection elements of the device of the figure 1 ,
  • the figure 6 is a schematic and partial sectional view of the junction between an electrical connection element and a power connection bar of the device of the figure 1 ,
  • the figure 7 represents, schematically and partially, in perspective, a connection element according to an exemplary implementation of the invention,
  • the Figures 8 and 9 represent, schematically and partially, in perspective, a connection element conforming respectively to two other examples of implementation of the invention, and
  • the figure 10 is a sectional view along XX, schematic and partial, of the connecting element of the figure 9 .

On a représenté sur la figure 1 un dispositif de stockage d'énergie 1 d'un dispositif micro-hybride à alterno-démarreur pour véhicule automobile.We have shown on the figure 1 an energy storage device 1 of a micro-hybrid device with alternator-starter for a motor vehicle.

Le cas échéant, le dispositif micro-hybride comprend un système de freinage récupératif.Where appropriate, the micro-hybrid device comprises a regenerative braking system.

Le dispositif 1 comporte une pluralité de cellules de stockage d'énergie 2, au nombre de dix dans l'exemple décrit, disposées verticalement suivant un axe longitudinal X, et une unité électronique 3.The device 1 comprises a plurality of energy storage cells 2, ten in the example described, arranged vertically along a longitudinal axis X, and an electronic unit 3.

Chaque cellule 2 comprend un super-condensateur ou EDLC en anglais (electrochemical double layer capacitator).Each cell 2 comprises a supercapacitor or EDLC in English ( electrochemical double layer capacitator ).

En variante, les cellules 2 peuvent comporter une batterie Li-On (Lithium-Ion), Ni-Mh (Nickel- Métal hydrure) ou au Plomb.Alternatively, the cells 2 may comprise a Li-On battery (Lithium-Ion), Ni-Mh (nickel-metal hydride) or lead.

L'unité électronique 3 comprend une carte de circuit imprimé 11 formant un circuit d'équilibrage des cellules 2.The electronic unit 3 comprises a printed circuit board 11 forming a cell balancing circuit 2.

Cette unité électronique 3 est distincte de convertisseurs DC/DC ou AC/DC, non représentés, qui sont reliés aux cellules 2 via des conducteurs de puissance, notamment des barres de puissance.This electronic unit 3 is distinct from DC / DC or AC / DC converters, not shown, which are connected to the cells 2 via power conductors, in particular power bars.

Les cellules 2 et l'unité électronique 3 sont disposées dans un boîtier 10, par exemple en matière plastique, comme illustré sur la figure 2.The cells 2 and the electronic unit 3 are arranged in a housing 10, for example made of plastic, as illustrated in FIG. figure 2 .

Les cellules 2 sont reliées entre elles en série à l'aide de conducteurs de puissance formés, dans l'exemple décrit, par des barres de puissance 5 ou bus bars en anglais.The cells 2 are connected together in series using power conductors formed, in the example described, by power bars 5 or bus bars in English.

Les cellules 2 sont reliées deux à deux à l'aide de barres de puissance 5 alternativement placées sur le dessus et le dessous des cellules 2, comme on peut le voir sur la figure 2 notamment.The cells 2 are connected in pairs by means of power bars 5 alternately placed on the top and the bottom of the cells 2, as can be seen in FIG. figure 2 especially.

Des liaisons électriques 4 sont prévues pour relier les cellules de stockage d'énergie 2 et l'unité électronique 3 pour permettre au circuit d'équilibrage de disposer d'informations représentatives d'une grandeur électrique, notamment d'un potentiel électrique, des cellules de stockage d'énergie 2.Electrical connections 4 are provided for connecting the energy storage cells 2 and the electronic unit 3 to enable the balancing circuit to have information representative of an electrical quantity, in particular an electrical potential, of the cells. energy storage 2.

Ces liaisons électriques 4 (traversées par exemple par un courant d'intensité d'environ 10 mA) sont différentes de liaisons de puissance (traversées par exemple par un courant d'intensité d'environ 200A, voire avec un pic d'intensité de 1000 A).These electrical connections 4 (traversed for example by a current of intensity of about 10 mA) are different from power links (traversed for example by a current of intensity of about 200A, or even with a peak of intensity of 1000 AT).

Dans l'exemple décrit, le potentiel pris sur le fond des cellules 2 est remonté à l'aide d'éléments de connexion électrique 12 verticaux.In the example described, the potential taken from the bottom of the cells 2 is raised using vertical electrical connection elements 12.

Les éléments de connexion 12 rigides sont réalisés en cuivre ou en aluminium par exemple, et présentent une section transversale sensiblement rectangulaire.The rigid connection elements 12 are made of copper or aluminum, for example, and have a substantially rectangular cross section.

Les éléments de connexion 12 sont nus, étant dépourvu de revêtement isolant.The connecting elements 12 are bare, being devoid of insulating coating.

Comme illustré sur la figure 6, chaque élément de connexion 12 comporte une branche rectiligne verticale 13 se prolongeant à son extrémité inférieure par une patte 14 plaquée sous la barre de puissance 5, sur un grand côté de celle-ci.As illustrated on the figure 6 each connecting element 12 has a vertical rectilinear branch 13 extending at its lower end by a lug 14 under the power bar 5, on a long side thereof.

La patte 14 est par exemple soudée sur la barre de puissance 5.The tab 14 is for example welded to the power bar 5.

En variante, l'élément de connexion 12 peut être fixé mécaniquement sur la barre de puissance 5, par exemple par vissage ou rivetage ou sertissage.Alternatively, the connection element 12 can be mechanically fixed to the power bar 5, for example by screwing or riveting or crimping.

L'élément de connexion 12 est connecté à son extrémité supérieure 15 à un autre élément de connexion 20 horizontal de la liaison 4 considérée, comme on peut le voir sur la figure 4 notamment.The connection element 12 is connected at its upper end 15 to another horizontal connection element 20 of the connection 4 considered, as can be seen on the figure 4 especially.

Cette jonction est réalisée par exemple par soudure électrique ou, en variante, de manière mécanique, par exemple par vissage ou rivetage ou sertissage.This junction is made for example by electric welding or, alternatively, mechanically, for example by screwing or riveting or crimping.

L'extrémité supérieure 15 de l'élément de connexion 12 est éloignée des cellules 2, étant accessible au dessus de celles-ci.The upper end 15 of the connection element 12 is remote from the cells 2, being accessible above them.

Dans l'exemple considéré, les éléments de connexion horizontaux 20, par exemple en cuivre ou en aluminium, comportent chacune une portion conductrice centrale 21 noyée dans la masse d'un support isolant commun 22, comme illustré sur la figure 2.In the example considered, the horizontal connection elements 20, for example copper or aluminum, each comprise a central conductive portion 21 embedded in the mass of a common insulating support 22, as shown in FIG. figure 2 .

Les portions 21 des éléments de connexion 20 sont surmoulées par une matière plastique, par exemple du polyamide, afin de former le support isolant 22 sous la forme d'une plaque à faces planes parallèles.The portions 21 of the connection elements 20 are overmoulded by a plastics material, for example polyamide, so as to form the insulating support 22 in the form of a plate with parallel flat faces.

Chaque portion 21 se prolonge, à une extrémité, par une première patte verticale 25 reliée à la branche 13 de l'élément de connexion 12 et, à l'autre extrémité, par une deuxième patte verticale 26 pourvue d'un ergot 27.Each portion 21 is extended at one end by a first vertical leg 25 connected to the branch 13 of the connection element 12 and at the other end by a second vertical leg 26 provided with a lug 27.

Les pattes 25 et 26 en extrémité font saillie sur la tranche de la plaque 22.The tabs 25 and 26 at the end protrude from the edge of the plate 22.

L'extrémité 15 de l'élément de connexion 12 et la patte 25 s'étendent à travers une ouverture 19 du support isolant 22.The end 15 of the connection element 12 and the tab 25 extend through an opening 19 of the insulating support 22.

L'ergot 27 est introduit dans une ouverture 28 de la carte de circuit imprimé 11, comme illustré sur les figures 3 et 4.The lug 27 is introduced into an opening 28 of the printed circuit board 11, as illustrated in FIGS. Figures 3 and 4 .

Cet ergot 27 est soudé à la carte 11 par exemple par une soudure par apport de matière (par exemple du type Etain/ Plomb) ou une soudure à la vague.This lug 27 is welded to the card 11 for example by a solder by adding material (for example of the type tin / lead) or a wave solder.

L'élément de connexion 20 est ainsi relié électriquement à une piste conductrice 29 de la carte de circuit imprimé 11.The connection element 20 is thus electrically connected to a conductive track 29 of the printed circuit board 11.

Bien entendu, la forme des première et deuxième pattes 25 et 26 peuvent être différentes.Of course, the shape of the first and second legs 25 and 26 may be different.

Dans l'exemple considéré, le support isolant 22 porte onze éléments de connexion électriques pour transmettre vers l'unité électronique 3 des informations de potentiel de dix cellules de stockage d'énergie 2.In the example considered, the insulating support 22 carries eleven electrical connection elements for transmitting to the electronic unit 3 potential information of ten energy storage cells 2.

On constate que, grâce à l'invention, les connexions entre l'unité électronique 3 et les cellules 2 peuvent être simples et nécessitent un nombre réduit d'opérations, notamment par rapport à l'utilisation de fils électriques.It can be seen that, thanks to the invention, the connections between the electronic unit 3 and the cells 2 can be simple and require a reduced number of operations, especially with respect to the use of electric wires.

De plus, l'invention permet de réaliser un détrompage, contrairement à des fils qui peuvent être intervertis, ce qui évite des erreurs lors de l'assemblage.In addition, the invention makes it possible to perform a keying, unlike wires that can be interchanged, which avoids errors during assembly.

Dans l'exemple qui vient d'être décrit, l'élément de connexion vertical 12 est accolé à la patte 25 de l'élément de connexion horizontal 20 (voir figure 4) pour réaliser la jonction.In the example just described, the vertical connection element 12 is attached to the lug 25 of the horizontal connection element 20 (see FIG. figure 4 ) to make the junction.

Bien entendu, il est possible de relier les éléments de connexion de manière différente.Of course, it is possible to connect the connection elements differently.

Par exemple, comme illustré à la figure 5, l'élément de connexion 12 relié à une barre de puissance peut s'étendre horizontalement et comporter une portion coudée 30 insérée dans une ouverture 31 réalisée sur l'élément de connexion 20 porté par le support isolant 22.For example, as shown in figure 5 , the connection element 12 connected to a power bar can extend horizontally and comprise a bent portion 30 inserted into an opening 31 made on the connection element 20 carried by the insulating support 22.

Comme visible sur la figure 7, il est possible de prévoir un élément de connexion 35 directement posé contre une paroi latérale 36 de l'une des cellules 2 en vue de transmettre une information de potentiel.As visible on the figure 7 it is possible to provide a connection member 35 directly placed against a side wall 36 of one of the cells 2 for transmitting potential information.

Cet élément de connexion 35 comprend une patte verticale 37 et, de part et d'autre de celle-ci, deux branches latérales 38 posées contre le haut de la paroi 36 de la cellule 2.This connection element 35 comprises a vertical tab 37 and, on either side of it, two lateral branches 38 placed against the top of the wall 36 of the cell 2.

Cet élément de connexion 35 est par exemple formé par découpe et pliage d'une tôle.This connection element 35 is for example formed by cutting and folding a sheet.

La patte 37 est pourvue d'un orifice 39 permettant de recevoir un ergot, non représenté, d'un élément de connexion à brider sur cette patte 37.The tab 37 is provided with an orifice 39 for receiving a lug, not shown, of a connection element to clamp on this lug 37.

On a représenté sur la figure 8 un élément de connexion 40 comportant deux portions sensiblement planes 41 et 42 séparées par un bourrelet 43. Ce bourrelet 43 permet de créer une faiblesse mécanique apte à absorber des efforts (par exemple des vibrations), ce qui limite les efforts sur les contacts avec les cellules 2.We have shown on the figure 8 a connection element 40 comprising two substantially flat portions 41 and 42 separated by a bead 43. This bead 43 makes it possible to create a mechanical weakness capable of absorbing forces (for example vibrations), which limits the forces on the contacts with the cells 2.

Cet élément 40 est posé sur deux cellules 2 voisines, chaque portion 41 ou 42 étant en contact avec une borne de l'une des cellules 2.This element 40 is placed on two neighboring cells 2, each portion 41 or 42 being in contact with a terminal of one of the cells 2.

L'élément de connexion 40 comporte un ergot 44 avec un orifice 39, à l'instar de la patte 37 précédemment décrite.The connection element 40 has a lug 44 with an orifice 39, like the lug 37 previously described.

L'élément 40 est réalisé par exemple par découpe et pliage d'une tôle métallique.The element 40 is made for example by cutting and folding a metal sheet.

Dans cet exemple, l'élément 40 sert à la fois de conducteur de puissance et pour remonter une information de potentiel via l'ergot 44.In this example, element 40 serves both as a power conductor and to reassemble potential information via pin 44.

D'autres formes d'éléments de connexion peuvent être prévues.Other forms of connection elements may be provided.

Par exemple, on a représenté sur les figures 9 et 10, un élément de connexion 50 également posé sur le dessus de deux cellules 2, et servant de conducteur de puissance.For example, we have shown on Figures 9 and 10 , a connection element 50 also placed on the top of two cells 2, and serving as a power conductor.

Cet élément 50 de forme généralement rectangulaire comprend une découpe centrale 51 dans laquelle s'étend une patte 52 destinée à être connectée à un autre élément de connexion, non représenté, pour transmettre une information de potentiel.This element 50 of generally rectangular shape comprises a central cutout 51 in which extends a tab 52 intended to be connected to another connection element, not shown, for transmitting potential information.

L'élément 50 est réalisé par exemple par découpe et pliage d'une tôle métallique.The element 50 is made for example by cutting and folding a metal sheet.

Bien entendu, l'invention n'est pas limitée aux exemples de mise en oeuvre qui viennent d'être décrits.Of course, the invention is not limited to the implementation examples which have just been described.

Par exemple, le support isolant 22 peut être agencé pour coiffer les cellules de stockage d'énergie 2 et comporter, le cas échéant, une ou plusieurs jupes de maintien 55 permettant de maintenir les cellules 2 les unes par rapport aux autres, comme illustré en pointillés à la figure 2.For example, the insulating support 22 may be arranged to cover the energy storage cells 2 and may include, where appropriate, one or more holding skirts 55 for holding the cells 2 relative to each other, as illustrated in FIG. dotted at the figure 2 .

Ces jupes 55 sont par exemple réalisées lors du surmoulage des éléments de connexion 22.These skirts 55 are for example made during overmoulding of the connection elements 22.

L'élément de connexion 12 peut, si on le souhaite, être relié directement à la carte de circuit imprimé 11.The connection element 12 can, if desired, be connected directly to the printed circuit board 11.

L'invention peut être appliquée à toute machine électrique nécessitant une liaison avec une source électrique, par exemple un alternateur simple.The invention can be applied to any electrical machine requiring a connection with an electrical source, for example a simple alternator.

Claims (16)

Dispositif de stockage d'énergie électrique (1), notamment pour équiper un véhicule automobile, comportant : - au moins une cellule de stockage d'énergie (2), - une unité électronique (3), comportant notamment une carte électronique (11), l'unité électronique étant notamment différente d'un convertisseur de tension, - au moins une liaison électrique (4) reliant ladite au moins une cellule de stockage d'énergie et l'unité électronique pour permettre à cette unité électronique de disposer d'une information représentative d'une grandeur électrique, notamment d'un potentiel électrique, de la cellule de stockage d'énergie, la liaison électrique comprenant au moins élément de connexion électrique sensiblement rigide (12) pourvu d'une extrémité (15) éloignée de ladite cellule (2). An electrical energy storage device (1), in particular for equipping a motor vehicle, comprising: at least one energy storage cell (2), an electronic unit (3) comprising in particular an electronic card (11), the electronic unit being in particular different from a voltage converter, at least one electrical connection connecting said at least one energy storage cell and the electronic unit to enable said electronic unit to have information representative of an electrical quantity, in particular of an electrical potential. of the energy storage cell, the electrical connection comprising at least substantially rigid electrical connection element (12) provided with an end (15) remote from said cell (2). Dispositif selon la revendication précédente, la cellule de stockage d'énergie s'étendant sensiblement suivant un axe longitudinal (X), caractérisé par le fait que l'élément de connexion électrique sensiblement rigide (12) comporte au moins une portion s'étendant sensiblement de manière parallèle à l'axe longitudinal de la cellule.Device according to the preceding claim, the energy storage cell extending substantially along a longitudinal axis (X), characterized in that the substantially rigid electrical connection element (12) comprises at least one portion extending substantially parallel to the longitudinal axis of the cell. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide comporte au moins une branche (13), notamment s'étendant verticalement.Device according to one of the preceding claims, characterized in that the substantially rigid electrical connection element comprises at least one branch (13), in particular extending vertically. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide (12) est relié à un conducteur de puissance (5), notamment une barre de connexion de puissance elle-même reliée à la cellule de stockage d'énergie.Device according to any one of the preceding claims, characterized in that the substantially rigid electrical connection element (12) is connected to a power conductor (5), in particular a power connection bar itself connected to the energy storage cell. Dispositif selon la revendication précédente, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide est soudé sur la barre de connexion de puissance.Device according to the preceding claim, characterized in that the substantially rigid electrical connection element is welded to the power connection bar. Dispositif selon le revendication 4, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide (12) est assemblé mécaniquement avec la barre de connexion de puissance, notamment par rivetage.Device according to claim 4, characterized in that the substantially rigid electrical connection element (12) is mechanically assembled with the power connection bar, in particular by riveting. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide (35) est fixé, notamment par soudure ou par assemblage mécanique, sur une paroi (36) de la cellule de stockage d'énergie, notamment une paroi latérale de celle-ci.Device according to any one of claims 1 to 3, characterized in that the substantially rigid electrical connection element (35) is fixed, in particular by welding or by mechanical assembly, to a wall (36) of the storage cell of energy, in particular a side wall thereof. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide (44) est formée directement sur une barre de connexion de puissance reliée à la cellule de stockage d'énergie.Device according to any one of the preceding claims, characterized in that the substantially rigid electrical connection element (44) is formed directly on a power connection bar connected to the energy storage cell. Dispositif selon la revendication précédente, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide est issu d'une découpe de matière sur la barre de connexion de puissance.Device according to the preceding claim, characterized in that the substantially rigid electrical connection element is derived from a blank of material on the power connection bar. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'une des extrémités de l'élément de connexion électrique sensiblement rigide est fixée sur l'unité électronique.Device according to any one of the preceding claims, characterized in that one end of the substantially rigid electrical connection element is fixed on the electronic unit. Dispositif selon l'une quelconque des revendications précédentes, comportant au moins deux cellules de stockage d'énergie voisines, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide (12) s'étend entre deux cellules de stockage d'énergie voisines.Device according to any one of the preceding claims, comprising at least two neighboring energy storage cells, characterized in that the substantially rigid electrical connection element (12) extends between two neighboring energy storage cells . Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide présente une section transversale sensiblement rectangulaire.Device according to any one of the preceding claims, characterized in that the substantially rigid electrical connection element has a substantially rectangular cross section. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide est nu.Device according to any one of the preceding claims, characterized in that the substantially rigid electrical connection element is bare. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'élément de connexion électrique sensiblement rigide est réalisé au moins partiellement en cuivre ou en aluminium.Device according to any one of the preceding claims, characterized in that the substantially rigid electrical connection element is made at least partially of copper or aluminum. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que la cellule de stockage d'énergie comporte au moins un super-condensateur.Device according to any one of the preceding claims, characterized in that the energy storage cell comprises at least one supercapacitor. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'unité électronique (3) comporte un circuit d'équilibrage des cellules de stockage d'énergieDevice according to any one of the preceding claims, characterized in that the electronic unit (3) comprises a circuit for balancing the energy storage cells
EP08105466A 2007-10-12 2008-09-30 Device for storing electric energy, in particular for equipping an automobile Withdrawn EP2048725A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0758283A FR2922377B1 (en) 2007-10-12 2007-10-12 DEVICE FOR STORING ELECTRIC ENERGY, IN PARTICULAR FOR EQUIPPING A MOTOR VEHICLE
FR0758281A FR2922378B1 (en) 2007-10-12 2007-10-12 DEVICE FOR STORING ELECTRIC ENERGY, IN PARTICULAR FOR EQUIPPING A MOTOR VEHICLE

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EP2048725A1 true EP2048725A1 (en) 2009-04-15

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US (1) US20090096418A1 (en)
EP (1) EP2048725A1 (en)

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